Pump



Feb 12 1924.;

c. F. PEARsoN v PUMP Filed April 5, 1922 Feb. 12 1924; 1,483,89

' c. F. PEARsoN PUMP Filed April s, 1922 2 Sheets-Sheet 2 jueza/oft' necte Patented elo. l2, a i924..y

dem: r. manson, or' cHIcAeo, ILLrNoIts. p

PUMP.

- generally, toA improve pumps.

Another object is to improve they construe-f tion of the piston of pumps, to reduce the eXpense of manufacture and to facilitate operation thereof.

A further object of the invention is the provision of two pumps and .means for connecting them together, in which one pump is adaptable for volume and the other for pressure, or one for 'pumping air and the other adaptable .for moving relatively small quantities of liquid.

The device is `especially desirable for usc in a spray burner for the combustion of oil in which the oil is atomized or pulverized by a whirling draft of air, the oil being moved by one pump and the air by the other pump the two pumps being positively cond together, the'same relative proportions ai'e maintained throughout all variations of speed atwhich the pumps are driven.

, of Fig. 1.

3 is a transverse section on line 3--3 of Flg. 1. In all the views the same reference charlacters yare employed tf1- vindicate similar parts.

In the drawings 5 indicates a housing or casing havin ing member 1s closed by an end by-plate .providing a bearing 8 a'nd a stuing 'box 9. In the particular showin the shaft support is Shown tohave a bal bearing4 in the hub 10. The plate 11 closes the opposite side of the casing 5 and` the parts are held to- ...gether by the bolts 12 and the nuts 1x3, 'the end plates.

a cylinder bore 6. The cas` Application led April 5, 1922. Serial' No. 549,815.

bolts passing thru the casing and thru the The end ,plates and the cylindrical portion of the casing 5 may have ribs 14 extending therefrom to provide a greater 60 surface for contact with the air whereby to 'carry off accumulated heaty due to compression of the'air. The hub 15, which is an integral part of the plate 11, is expanded at 16 to provideL another housing for a pump 65 17. The pump 17 consists of the housing 16 having a cylinder borev 18 and having ports 19 and 2O connected thru a valve 21 to provide a by-pass between the intake 22 and thedischarge 23.0f the pump, so thathif `70 f the resistance which th'e pumped liquidk or fluid encounters is greater than safety would warrant, the valve 24 is automatically lifted against the spring 25 and the liquid will pass from the discharge opening 23 thru theportl 75 20, the valve 21, into the port ,19, back tdq lthe intake opening 22.

A pipe 26 delivers the liquid or fluid from 'the pump 17 and the pipe 27 communicates with the supply of liquid to be pumped or moved by the pump.v A larger pump 28 is provided with a two-part rotating piston sleeve 29 and 30j, which contains a cavity 31.- The two iston parts are held together by screws 32. he piston sleeve parts 29 'and 30 each containtwo registering slots, 33 on one side of a diametric plane and 34 on the opposite side. These slots are parallel and in them the` blades35- and 36 are reciprocated as. the piston isrotated. The composite iston sleeve, 29-30, is eccentricto the cylinder bore 6 and as the piston is r0- tated the blades 35 and 36 will move inwardly and outwardlyof the respective slots.

' Each of the blades is provided with an arm 95 37 that extends towards the opposite blade and `between the arms is an open helical spring 28 that presses the blades outwardly so that their ends lconta-ct with the inner surface of the bore 6.

The piston sleeve, 29-30, is rotatable upon a two-part shaft, the part 39 is connected to the piston sleeve part 29, and the part 40 is connected to the iston sleeve part 30. The outer end, 41 of t e shaft 40, is reduced and is provided with a'slot 42' which engages the pin 43 of the shaft 44 that drives the piston' 45 of the smaller pump.

Aplate 46 is held on theouter end of the pump 17 and when the plate is removed the piston 45 may be taken freely from the lcasing or housing 16. On plate 46 is provided a hollow hub 48 containing a lug 49 pressed against the blades 50 and 5l that are reciprocatable in suitable slots of the piston .45. The hollow hub 48 contains a spring 52 which yieldingly holds the lug 49 in contact with the piston and the reciprocating blades therein.

The pump 28 is provided with an intake opening 54 and a discharge opening 55.

From the foregoing description the operation of the pump will be well understood- While l have herein shown a single embodiment of my invention for thel purpose of clear disclosure, it Awill be mamfest to.

through, one on each side of its axis of rotation; means to hold the members together; a blade in each slot; an arm attached to each blade and extending toward the other blade beyond the axis of `rotation and wholly Within the wall of the` sleeve and a spring between the arms to yieldingly hold the blades in outward positions.

2. A ump structure comprisinga housing enc osing a vcylinder bore; a two-part hollow, rotatable' sleeve eccentric to the bore, said parts having registering slots, one on each side of an axial diameter and parallel therewith; means to hold the parts toresales;

gether; a blade in each slot of the composite piston; an arm extending from each-blade toward the other blade, inside the sleeve, and ank open helical spring between said arms to ieldingly hold the outer edge of said bla es in contact with the inner surface of the housing surrounding the bore, when the composite piston is rotated.

3. A pump structure comprising a housing having a cylinder bore and a rotary piston therein; plates to close the ends of the bore, each vplate carrying a shaft support, one said support enlarged at its freeend to provide another housing containing a cylinder bore and another rotary piston therein and a shaft connecting both pistons.

4. A pump structure comprising two spaced apart housings; a rotary pump pis ton in each housing, rotatable about the same axis; an intermediate shaft-bearing expanded at one end to provide one of said housings, supported by said bearing; a twopart'shaft and a slip connection for the said shaft parts within said bearing.

5. A piston' for a rotary pump comprising a two part sleeve divided centrally of its axis into two cup-shaped members and closed at its ends having two parallel slots extending inwardly, one on each side of its axis of rotation and beyond the axis; a

' blade reciprocable in each slot; an arm secured to the inner end of eachk blade extending toward the other blade past said axis and out of the path of either blade; an open compresson spring between the arms; means to hold the two parts of the sleeve together and a shaft connected to each part of the sleeve. f

In testimony whereof I hereunto subscribe my name.

CARL F. PEARSON. 

